Effect of dehydration on spectral reflectance and photosynthetic efficiency in Umbilicaria arctica and U. hyperborea

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F15%3A00082594" target="_blank" >RIV/00216224:14310/15:00082594 - isvavai.cz</a>
Result on the web
<a href="http://link.springer.com/article/10.1007/s10535-015-0506-1" target="_blank" >http://link.springer.com/article/10.1007/s10535-015-0506-1</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10535-015-0506-1" target="_blank" >10.1007/s10535-015-0506-1</a>

Result language
angličtina
Original language name
Effect of dehydration on spectral reflectance and photosynthetic efficiency in Umbilicaria arctica and U. hyperborea
Original language description
In many polar and alpine ecosystems, lichens of genus Umbilicaria represent dominant species forming community structure. Photosynthetic and spectral properties of the lichens may change rapidly according to an actual hydration status of their thalli. Inthis study, we investigated responses of photochemical reflectance index (PRI), normalized difference vegetation index (NDVI), effective quantum yield of photosynthetic efficiency of photosystem (PS) II (PhiPSII), and several photosynthetic parameters derived from fast induction kinetics of chlorophyll fluorescence (OJIP) to controlled dehydration. We used U. arctica and U. hyperborea collected close to Nuuk, Greenland. In both the species, PRI showed a curvilinear increase with dehydration, i.e., a decreasing water potential (WP). The increase was apparent within WP range of 0 to minus 10 MPa. The PRI increase was less pronounced in U. arctica than in U. hyperborea.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EF - Botany
OECD FORD branch
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Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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